On-Vehicle Inspection [12/2019 - 10/2022]: Procedure

INSPECTION METHOD

Perform a cooling system pressure check to confirm if there are leaks present from areas of the cooling system other than the water pump.

Refer to ON-VEHICLE INSPECTION [12/2019 - 10/2022]

Are leaks preset in the cooling system other than from the water pump?

Result

Result	Proceed to
Yes	Continue leak diagnosis per the RM and correct any other cooling system leaks first before proceeding
No	Go to Step (b)

Is the coolant level below the "low" indicator on the reservoir?

Result

Result	Proceed to
Yes	Replace the water pump
No	Go to Step (c)

Does the water pump pulley/bearing have excessive free play or does not turn smoothly?

Result

Result	Proceed to
Yes	Replace the water pump
No	Go to Step (d)

A paper towel should be used to determine if a leak is active or was temporary due to debris that has now cleared.

Apply a dry paper towel to the coolant deposits around the water pump. If the paper towel remains dry the leak was temporary and the water pump does not need to be replaced.

If the paper towel becomes wet the leak is active and the water pump should be replaced.

Dry Paper Towel:
DO NOT Replace Water Pump

Wet Paper Towel:
Replace Water Pump

Is the coolant residue wet on the paper towel?

Result

Result	Proceed to
Yes	Replace the water pump
No	No active leak is present, confirm coolant level in the reservoir is correct, clean any coolant residue from the engine and surrounding areas and return the vehicle to the customer.